Abstract
Out of the variety of so-called chip breakers for carbide tools, we have chosen the Deflectortype, having simple attachments, occupying small space, and succeeded in the shop practice. In this report, not only the result of experimental studies on the foundamental conditions, such as chip flow direction, curling radius of chips, cutting force and it's vibrations, about which it is necessary for us to know when we use these types of chip breaker, but also the effective diagram for cutting conditions, are described. The experimental equations of this effective range are as follows, (1) V·a0.35=187/T0.23 for SF 54 (2) V·a0.35=218/T0.35 for SNC 90 (3) eV0.74=73a+35 where, V is cutting speed in m/mn, a is cutting thickness in mm, T is tool life in mn, and e is setting distance of the deflector in mm.
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